Home›Maneuver Tracker›Close Approaches›COSMOS 2346 ⟷ COSMOS 1506
HighProximity
RussiaCOSMOS 2346NORAD 24953 · launched Sep 1997Military payload
3.43kmPredicted miss distance
RussiaCOSMOS 1506NORAD 14450 · launched Oct 1983Military payload
Final forecastFinal forecast, made minutes before the pass.
Closest approach3 Nov 202610:12 UTC
Relative speed8.86 km/sat the closest approach
Altitude983 kmlow Earth orbit
Last confirmed3 Nov10:10 UTC · final forecast
Track COSMOS 2346Track COSMOS 1506All approaches
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RU COSMOS 2346 and RU COSMOS 1506 were predicted to reach a closest approach of 3.43 km at 2026-11-03 10:12 UTC, at a relative speed of 8.86 km/s. Final forecast, made minutes before the pass. Miss distance and time of closest approach are computed by propagating the latest published orbital elements for both objects, and each pass is re-checked every 20 minutes as new element sets are published. See the Satellite Maneuver Tracker for the live picture and space situational awareness for context.

Why it mattersBoth objects are catalogued as payloads. Screening continues as new element sets arrive; operators act on their own conjunction data.

The Two Objects

Dossiers from the satellite directory
COSMOS 2346Payload
NORAD 24953
CountryCIS
Launched1997-09-23
OrbitLEO · 936 × 993 km
COSPAR1997-052A
Maneuver capableUnknown
Profile →Globe →
COSMOS 1506Payload
NORAD 14450
CountryCIS
Launched1983-10-26
OrbitLEO · 945 × 1,007 km
COSPAR1983-108A
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 983 KMISS 420Starlink 550

At 983 km this pass sits inside the most congested band in low Earth orbit, home to the debris left by the 2007 ASAT test and the 2009 collision. Objects here stay up for decades: there is too little atmospheric drag to clean the band naturally. Why crowded bands matter →

History Between This Pair

1 predicted pass under 10 km
Pair history · COSMOS 2346 ⟷ COSMOS 1506
2026-11-03 10:123.43 km Final forecast8.86 km/s983 kmShown above

Repeat encounters are common for objects in near-intersecting orbital planes. Each pass is re-screened as fresh element sets arrive; "Final forecast" means the screening still predicted it within 45 minutes of its time, "Not re-confirmed" means later screening stopped finding it.

Forecast Record

Every figure published for the pass shown above, newest first. Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.
Computed · figure · predicted time · orbit data · by
3 Nov 09:13 UTC3.43 km Forecast3 Nov 10:12 UTC2 Nov 20:07 UTCRe-check
2 Nov 21:35 UTC3.44 km Forecast3 Nov 10:12 UTC2 Nov 11:17 UTCRe-check
2 Nov 10:34 UTC3.45 km Forecast3 Nov 10:12 UTC2 Nov 02:31 UTCRe-check
2 Nov 10:14 UTC4.03 km Forecast3 Nov 10:12 UTC2 Nov 02:31 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.74 km11-03 09:25 UTC
COSMOS 2346COSMOS 1275 DEB
2.60 km10-31 02:11 UTC
COSMOS 2334COSMOS 1506
3.53 km11-02 14:01 UTC
COSMOS 2346SDA_1668

How These Numbers Are Computed

Miss distance and TCA come from propagating the latest published orbital elements for both objects and searching for the minimum separation over the screening window. Element sets carry kilometre-scale uncertainty, so figures here describe a close pass, not a collision prediction; a change in either object's published elements re-computes the pass automatically. What is a conjunction? → How conjunction assessment works →